function getXMLHttp(){
	var XMLHttp = null;
	if (window.XMLHttpRequest) {
		try {
		 	XMLHttp = new XMLHttpRequest();
		 	} catch (e) { }
		 	} else if (window.ActiveXObject) {
		try {
		 	XMLHttp = new ActiveXObject("Msxml2.XMLHTTP");
		 	} catch (e) {
		try {
		 	XMLHttp = new ActiveXObject(
			 "Microsoft.XMLHTTP");
			 } catch (e) { }
				 }
			}
	return XMLHttp;
		}